From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The apparatus required to create standard test rigs for bought-out electrical accessories.
| Identifier | ExFiles\Box 167\2\ img106 | |
| Date | 15th May 1937 | |
| To Hs.{Lord Ernest Hives - Chair} from Rm{William Robotham - Chief Engineer}/Wst. Space Rm{William Robotham - Chief Engineer}/Wst.2/AP.15.5.37 RE. STANDARD TEST RIGS FOR ACCESSORIES BOUGHT OUT. Referring to your suggestion that we should specify and institute standard tests for all electrical pieces bought outside or manufactured by ourselves, we have gone into the matter and have already made out specifications for most of the units;- In order to produce the standard electrical test rigs to carry out these tests in the Laboratory, we require some extra inexpensive apparatus and we should like to have your agreement to instructing EJJ. to obtain the same. The apparatus required is as follows:- (1) Headlamp foot switch test rig. ✓ 1 - 110 volt 1/4.HP. variable speed D.C.motor worm geared ratio 5 5/8 to 1 type B.T.H. BD.{Mr Berend}236. The catalogue price is £7. 2. 0. ✓ 1 - Ferranti 2 1/2" moving iron voltmeter 0-20 volts. The catalogue price is £1.9.0. (2) Starter Switch Test Rig. 1 - 110 volt 1/4 HP. as in (1) above except that ratio should be 28 : 1 ✓ 1 - Ferranti 2 1/2" moving iron voltmeter 0 - 15 volts. (3) Speedometer and rev-counter test rig. Two retort stands. 1 - 110 volt D.C. 1/4 HP. B.T.H. BD.{Mr Berend}236 motor. Catalogue Price £3.12. 0. (4) H.T.Ignition cable test rig. ✓ 1 - 200-240 volt A.C. synchronous motor. 1/8 HP. speed 1000 or 2000 r.p.m. Rm{William Robotham - Chief Engineer}/Wst. | ||